Service Manual for
RCO Speed Oven
30
GENERAL SYSTEM TEST
Introduction
The systems control of the oven can be set up for
distinct operating conditions and functional displays.
The control board also allows diagnosing oven parts
and components for functionality. Please refer also to
the owner’s manual for details.
Oven Operating Statistics
The oven stats screens are accessed through the
oven support screen by pressing the corresponding
soft key. The oven statistics allow reviewing operating
parameters of functional parts of the oven. The statistics
screens can be left anytime for oven operation by
pressing the EXIT soft key. To flip pages of the oven
statistics, the NEXT soft key is to be pressed.
Screen Displays
Screen 1:
• SOFTWARE VER. – the firmware version loaded
on the control board.
• BOOTLOADER VER. – the bootloader version
loaded on the control board.
• GRAPHICS SET – the graphics set version loaded
on the control board.
•
CAB MAX TEMP – the maximum temperature the
control board has reached (°F or °C)
•
CAB TEMP – the current temperature of the control
board (°F or °C)
Screen 2:
•
TOTAL COOKS – the number of recipes that have
been cooked
• HT ELEMENT HR – the cumulative time, in hours,
that the heating elements have been operating
• FAN HOURS – the cumulative time, in hours, that
the convection blowers have been operating
• MAG 1 – the cumulative time (hh:mm:ss) that
magnetron 1 has been operating.
• MAG 2 – the cumulative time (hh:mm:ss) that
magnetron 2 has been operating.
Screen 3:
• The error screen shows the reported errors for
each error condition
• During regular use of the oven, the operator
might be confronted with several error screens. It
is important for servicing the oven to identify the
group of components that might have caused the
error report.
Error Messages
Magnetron error:
This error will only occur if one of the
magnetrons is inactive. If both of them are inactive, then
it will be a
Door Ajar
error. If this screen is displayed,
the magnetron supply currents have been recorded not
to be nominal. The supply current on the primary side
of the High Voltage transformer is nominally between 7
Amps and 9 Amps. In case of a damaged high voltage
component, this current usually drops to levels below 3
Amps, as the transformer secondary coil’s load changes.
The current will drop to 0 Amps if any component on the
primary side fails and is in a non-conducting condition
(including the interlock system).
Cooking with the oven is still possible with the exception
of the related magnetron/s being inoperative.
Fan error:
If this screen is displayed, no further operation
of the oven is possible. Reset the oven by unplugging
it for at least one full minute and plugging it back in. To
prevent a fire hazard when the convection blowers are
not running, the inverter sends an error signal to the
control board to cut the power supply to the heating
elements. Check the fan wiring for good connections.
Probe error:
If this screen is displayed, no further
operation of the oven is possible. Try resetting the
probe error by unplugging the oven and plugging it back
in. The RTD temperature probe in the cavity sensed
a high temperature condition in the oven cavity or is
damaged preventing temperature regulation in the oven
cavity. Check the RTD wiring for proper connections. A
bad connection at the RTD may cause a Probe Error.
Door Ajar error:
If this screen is displayed, the
magnetron supply currents have been recorded not to
be nominal. The supply current on the primary side of
both High Voltage transformers are nominally between
7 Amps and 9 Amps. In case of a damaged high voltage
component, this current usually drops to levels below 3
Amps, as the transformers secondary coil’s load changes.
The current will drop to 0 Amps if any component on the
SYSTEM AND COMPONENT TESTING
